1)Mechanical struction of machine is not so easy to
design with hydraulic type,the hydraulic system will
involve to the high-pressure oil pump and
oil tube ,and the oil pressure is slow the explosive
is not enough.
2)Just some quality of machine to change ths design ,
the research and so on cost is much ,and if change
too much parts need to redesgn and change.
we enginner will consider and try to make
the machine more upgrade in future.
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